Class 1 Let him who stands take heed lest he fall (1 Cor 10:1-14) 
Class 2 Out of the bondage of Egypt (Ex 15) 
Class 3 Heavenly sustenance in a barren wilderness (Ex 16) 
Class 4 Wonderful & Fearful events at Mt Sinai (Ex 24) 
Class 5 An 11 days march to the promised land (Num 10) 
Class 6 Grim warning to a lost generation (Num 14:1-34) 
Class 7 The Last month of Moses' life - a new era dawns (Deut 10)